DMT from my experience dislodges repressed feelings, and repressed trauma allowing more consciousnesss as repression is lessened.
It also has a way of making one face some of his demons (repressed evil or what one might call evil), which makes one more compassionate once one see's his own evil he slowly stops projecting it on others the emotional charge is lessened quite substantially.
That would cause big changes in any one, so I could imagine what it might do for the Governing Body, but I would think thier delusion might be pretty hard to crack so they may need about 10+ big doses to finally see thier delusion and stop projecting the Evil One on all that oppose them.
I must have done anywhere from 50 -100 trips years ago and I can still see changes happening to me at present that I atribute to what I did years ago.